Banks may now be tight with loans, but let’s just say that Cartier didn’t hold back for their 100th Anniversary Celebration in America at the Cartier mansion on 5th Avenue to benefit Service Nation, which encourages volunteerism. Anne Hathaway, Kate Hudson, Jessica Biel, Demi Moore, Eva Mendes, Justin Timberlake and Rachel Weisz may have looked like a million dollars at the Cartier Mansion on last night, but collectively they had on nearly three times that amount in borrowed Cartier gemstones — and that’s not counting the bling of Sir Elton John (also in the house). Just Hudson’s diamond and onyx panther necklace alone would have set her back $905,000, not to mention her $230,000 diamond cocktail ring and diamond studs. Timberlake was a diamond stud himself, wearing an onyx and emerald panther tie pin and onyx and diamond cufflinks. “I made a joke to my stylist tonight,” said Hathaway, herself bedecked in over $500,000 worth of Cartier jewelry. “That if I lost [a piece] tonight, technically, it wouldn’t be like losing it, because, after all, I would be at Cartier. And he said [emphatically] . . . ‘No!’” Mendes concurred. “I’m very upset that I have to give back this panther ring in the morning.” But no, she wasn’t afraid of losing the ring worth $220,000. “No, they’ve got insurance for that, Love. It’s never happened, because when things are not mine, I take even more care of them.”

Upstairs at the mansion the history of 100 years of conspicuous luxury was told through a bling-tastic exhibit of bejeweled ornaments created by Cartier for J.P. Morgan, Doris Duke, Barbara Hutton, Gloria Swanson, Elizabeth Taylor, Princess Grace, Elton John’s 43 carat heart-shaped sapphire ring and more. “There was a really lovely, very modern ring for Daisy Fellowes,” said Moore, who helped Cartier announce their partnership with ServiceNation to donate a portion of the sales of their Trinity bracelet to the organization. If you can’t afford the jewelry, pick up a copy of Bruce Weber’s anniversary homage to Cartier, appropriately entitled Cartier I Love You!, at teneues.com. – Jeffrey Slonim